Adyen Apple Pay fix + live penny test | payment flow (pre-launch)

Solo founder, pre-launch. I need help with two things in order: 1. Fix or diagnose Adyen Apple Pay “UI dismissed” (merchant validation + session config; I have .well-known in place but hit a wall). 2... (Budget: $10 - $13 USD, Jobs: API Integration, FinTech, Payment Gateway Integration, Payment Processing, Python, React.js)